Designer/Domino 8.5.1 - Attachment File Names - Don't Display

Since upgrading from Designer & Server Domino 8.0.2 to 8.5.1 titles of file attachments on a Page no longer display via the Web UI. For example the Excel icon displays correctly but the actual file name no longer appears. If you mouse over the Excel icon the file name is displayed as normal.Not sure whether this is a server side issue or the Designer client.

The file name DOES display on the Page in the designer client.

Pages with file attachments added using Designer 8.0.2 continue to display correctly but if replaced the titles disappear from the page.

Same with IE & Firefox.

Is this a bug ? Any thoughts ??